<template>
  <!-- 首页/用户管理/用户列表 -->
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item><span>添加商品</span></el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card>
      <!--提示区域-->
      <el-alert
        title="消息提示的文案" type="info" center :closable="false" show-icon>
      </el-alert>

      <!--步骤条-->
      <el-steps :space="200" :active="activeIndex.parseInt" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!--tab栏区域-->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-position="top" label-width="100px">
      <el-tabs :tab-position="'left'" v-model="activeIndex"
               :before-leave="beforeTableLeave" @tab-click="tabClicked">
        <el-tab-pane label="基本信息" name="0">

          <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
          </el-form-item>
          <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addForm.goods_price" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="addForm.goods_weight" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number"></el-input>
          </el-form-item>

          <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader
              v-model="addForm.goods_cat"
              :options="cateList"
              expand-Trigger="hover"
              :props="cateProps"
              @change="handleChange"></el-cascader>
          </el-form-item>

        </el-tab-pane>
        <el-tab-pane label="商品参数" name="1">
          <!--渲染表单item项-->
          <el-form-item :label="item.attr_name" v-for="item in this.manyTableData" :key="item.attr_id">
            <!--复选框组-->
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox border :label="cb" v-for="(cb, i) in item.attr_vals" :key="i"></el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品属性" name="2">
          <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
            <el-input v-model="item.attr_vals"></el-input>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品图片" name="3">
          <el-upload
            :action="uploadURL"
            :headers="headerObj"
            :on-success="handleSuccess"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            list-type="picture">
            <el-button size="small" type="primary">点击上传</el-button>
          </el-upload>
        </el-tab-pane>
        <el-tab-pane label="商品内容" name="4">
          <quill-editor v-model="addForm.goods_introduce">

          </quill-editor>
          <el-button class="btn_add" type="primary" @click="addGoods">添加商品</el-button>
        </el-tab-pane>

      </el-tabs>
      </el-form>
    </el-card>

    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="500px">
      <img :src="previewPath" class="previewImg">
    </el-dialog>
  </div>

</template>

<script>
import axios from 'axios';
import _ from 'lodash';
import { addQuillTitle } from '../../plugins/quill-title';
export default {
  data () {
    return {
      // 步骤条和侧边栏共用同一个数据项, activeIndex去激活对应的name
      activeIndex: '0',
      // 添加商品的表单数据
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属分类数组
        goods_cat: [],
        pics: [],
        // 商品的详情藐视
        goods_introduce: '',
        attrs: []
      },
      // 添加商品的表单验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请填写商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请填写商品价格', trigger: 'blur' },
          { min: 0, message: '价格填写有误', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请填写商品重量', trigger: 'blur' },
          { min: 0, message: '重量填写有误', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请填写商品数量', trigger: 'blur' },
          { min: 0, message: '数量填写有误', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类数据
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数
      manyTableData: [],
      // 静态属性
      onlyTableData: [],
      uploadURL: 'http://timemeetyou.com:8889/api/private/v1/upload',
      // 图片上传组件请求头 el-upload自己内部封装了一套ajax方法 ,并没有走axios请求,所有无效token
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览路径
      previewPath: '',
      previewVisible: false

    };
  },
  created () {
    this.getCateList();
  },
  mounted () {
    addQuillTitle();
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList () {
      const { data: res } = await axios.get('categories');
      if (res.meta.status !== 200) return this.$message.error('获取商品分类失败!');
      this.cateList = res.data;
      console.log(res.data);
    },

    // 级联选择器选中项变化时出发
    handleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat.length = [];
        this.$message.warning('只允许选择三级标签');
      }
    },
    beforeTableLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3 || this.addForm.goods_name === '') {
        this.$message.warning('请先填写必填项!');
        return false;
      }
    },
    // tab 的点击事件
    async tabClicked () {
      //  证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await axios.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'many' } });
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数失败!');
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0
            ? [] : item.attr_vals.split(' ');
        });
        this.manyTableData = res.data;
        console.log(this.manyTableData);
      } else if (this.activeIndex === '2') {
        const { data: res } = await axios.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } });
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败!');
        }
        this.onlyTableData = res.data;
      }
    },

    // 处理图片预览效果
    handlePreview (file) {
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },

    // 处理移除图片的操作
    handleRemove (file) {
      // 1.获取将要删除图片的临时路径
      const filePath = file.response.data.tmp_path;
      // 2.从pics数组中，找到图片对应的索引值
      console.log(this.addForm.pics);
      const i = this.addForm.pics.findIndex(x => x.pic === filePath);
      // 3.调用splice方法，移除图片信息
      this.addForm.splice(i, 1);
    },
    // 监听图片上传成功的事件
    handleSuccess (response) {
      // 拼接得到一个图片对象
      const picInfo = { pic: response.data.tmp_path };
      // 将图片信息对象push到pics数组中
      this.addForm.pics.push(picInfo);
      console.log(this.addForm);
    },
    // 添加商品
    addGoods () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.warning('请填写必要表单项!');
        }
        // 执行添加得逻辑
        console.log(this.addForm);
        // 发送请求前：需对提交的表单进行处理goods_cat attrs
        // this.addForm.goods_cat = this.addForm.goods_cat.join(',')
        // 以上写法不对：级联选择器绑定的对象goods_cat要求是数组对象
        // 解决办法: 包：lodash 方法（深拷贝）：cloneDeep(boj)

        // 将this.addForm进行深拷贝
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(',');

        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          };
          this.addForm.attrs.push(newInfo);
        });
        console.log('动态');
        console.log(this.manyTableData);
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          };
          this.addForm.attrs.push(newInfo);
        });
        form.attrs = this.addForm.attrs;

        // 发起请求
        // 商品得名称必须唯一
        const { data: res } = await axios.post('goods', form);
        console.log(res);
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败!');
        }
        this.$message.success('添加商品成功!');
        this.$router.push('/goods');
      });
    }

  },
  computed: {
    // 最终的三级id
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    }
  }
};
</script>

<style lang="less" scoped>
span{
  font-weight: bold;
  color:#409eff
}
.el-steps {
  margin: 15px 0;
}
.el-step__title {
  font-size: 13px !important;
}
.el-step__title.is-process{
  color: #B5FFFC;
}
.el-checkbox {
  margin: 0 5px 0 0
}
.previewImg {
  width: 100%;
}
.btn_add {
  margin-top: 15px;

}

</style>
